請問AES/EBU的Protocol Spec何處可尋?
發表於 : 週日 6月 05, 2005 10:13 am
聊耳機、品音樂、論音響、玩電子DIY以及哈拉風花雪月的地方
http://w.andaudio.com/phpbb3/
jcg 寫:AES = Audio Engineering Society
EBU = European Broadcast Union
兩者都是組織名稱,彼此間沒什麼關係。
AES/EBU是AES和EBU根據IEC 60958 Type I (使用阻抗110ohm的平衡線、XLR接頭)共同制定的數位音訊傳輸協定。 而S/PDIF只不過是Sony與Philips把AES/EBU的通訊協定照抄一遍,然後改用阻抗75ohm的同軸電鑬+RCA頭或是Toslink光纖來作傳輸線。
AES/BEU由於使用平衡傳輸而且輸出電平有5V,所以抗雜訊能力較高。在需要長距離傳輸的場合會比較適合。如果沒有長距離的問題的話,使用BNC接頭的阻抗75ohm同軸電鑬應該是比較適合。最好別用RCA頭,因為它的阻抗不是75ohm。(據說有特製的75ohm RCA頭+座)
S/PDIF was developed from a standard used in the professional audio field, known as AES/EBU which is commonly used in Digital Audio Tape (DAT) systems. S/PDIF remained identical at the protocol level, but changed the physical connectors from......
jcg 寫:疑……跟我看到的不一樣說……
http://en.wikipedia.org/wiki/S/PDIFS/PDIF was developed from a standard used in the professional audio field, known as AES/EBU which is commonly used in Digital Audio Tape (DAT) systems. S/PDIF remained identical at the protocol level, but changed the physical connectors from......
其它比較知名的數位音訊傳輸格式還有Philips制定的I2S (Inter IC Sound),它用了三條導線,一條傳輸clock,一條word select,一條data。不過它原本的設計是給PCB上的IC之間傳輸數位音訊之用,不知道能不能用於器材與器材間長距離的傳輸就是了……